Gapless Spin-Liquid Ground State in the S=1/2 Kagome Antiferromagnet

The defining problem in frustrated quantum magnetism, the ground state of the nearest-neighbor S=1/2 antiferromagnetic Heisenberg model on the kagome lattice, has defied all theoretical and numerical methods employed to date. We apply the formalism of tensor-network states, specifically the method of projected entangled simplex states, which combines infinite system size with a correct accounting for multipartite entanglement. By studying the ground-state energy, the finite magnetic order appearing at finite tensor bond dimensions, and the effects of a next-nearest-neighbor coupling, we demonstrate that the ground state is a gapless spin liquid. We discuss the comparison with other numerical studies and the physical interpretation of this result.

[Clinicopathologic characteristics of head and neck carcinoma showing thymus-like element]

Objective: To investigate clinicopathological features of carcinoma showing thymus-like elements (CASTLE) in the head and neck regions. Methods: Clinicopathological data of 7 patients with CASTLE in the head and neck regions were retrospectively reviewed.Immunohistochemical staining and in situ hybridization for EBER were performed. BRAF(V600E) mutation was examined by ARMS method in 6 cases. Results: There were 5 females and 2 males with age between 49 and 78 years (average of 65.6 years). All tumors were solitary nodular lesions with an infiltrative border, including 6 intrathyroid tumors and 1 extrathyroid tumor in the laryngeal pharynx.The tumors were 1.7-4.1 cm in diameter (average of 3.0 cm). Four cases demonstrated lymph node metastasis.All patients were alive without metastasis during follow-up, except one consultation case (with FNA sample) developed recurrence at the primary site. The cases showed different immunoreaction to CD5, diffuse immunoreaction with p63, CK5/6 and CD117, but negative staining for TTF1, TG and calcitonin. One case showed positive immunoreaction with Synin less than 30% tumor cells. The Ki-67 labeling index was between 3% and 90%. No BRAF(V600E) mutation and EB virus infection were detected. Conclusions: Extrathyroid CASTLE involving laryngeal pharynx shows the similar morphological and immunohistochemical features with intrathyroid CASTLE.Immunohistochemical markers of CD5 and CD117 are helpful in the diagnosis. Ki-67 labeling index can be high in CASTLE, especially in lymphoepithelioma type. CD5-negative CASTLE may have neuroendocrine differentiation. BRAF(V600E) mutation and EB virus may not be involved in the carcinogenesis of CASTLE.

Fine mapping and candidate gene analysis of Brtri1, a gene controlling trichome development in Chinese cabbage (Brassica rapa L. ssp pekinensis)

Trichomes are derived from the epidermis and constitute an ideal system for studying cell division in plants. Here, a Chinese cabbage doubled haploid (DH) line (FT) without trichomes was crossed with another DH line (PurDH-1) with trichomes to develop an F₂ population for fine mapping of trichome control genes. Genetic analysis showed that the trichome phenotype was controlled by a single dominant gene, Brtri1. Using 1226 glabrous individuals in the F₂ segregation population, Brtri1 was localized to a 16.84 kb region between markers Pur6-31 and Pur6-39 on chromosome A06. One of the four complete open reading frames within the mapping region, Bra025311, encodes a MYB transcription factor and is highly homologous to the trichome regulatory gene GL1 in Arabidopsis thaliana. It was thus regarded as a candidate gene for Brtri1. Comparative sequencing showed a 5-bp deletion in the third exon of Bra025311 in FT, resulting in a frame-shift mutation. No expression of Bra025311 was detected in FT. A co-dominant indel marker close to this mutation site was developed for marker-assisted selection in Chinese cabbage breeding.

[Primary central nervous system diffuse large B cell lymphoma: a clinicopathologic and molecular study]

Objective: To investigate clinicopathologic characteristics, immunophenotype and EB virus-related molecular genetic alterations in primary central nervous system diffuse large B cell lymphoma (DLBCL) along with correlation with clinical prognosis. Methods: A total of 30 cases of primary central nervous system DLBCL were retrospectively studied by retrieving clinical data, histological evaluation and immunophenotyping by EnVision two steps methods. The expression of EBER mRNA was detected by in situ hybridization and bcl-2, bcl-6 and C-MYC gene abnormalities were analyzed by interphase fluorescence in situ hybridization. Results: The cases included 18 males and 12 females (sex ratio of 1.5∶1.0) with an age ranging from 24 to 78 years (average age of 52 years, the median age of 53 years). The single primary clinical presentation was focal neurologic deficits. Tumor locations were supratentorial (21 cases), subtentorial (7 cases), involving both locations in 2 cases. Diffuse growth pattern was observed with large lymphoid cells mostly resembling centroblasts with abundant basophilic cytoplasm with oval to round, vesicular nuclei containing fine chromatin. An angiocentric and angiodestructive growth pattern was also present. Other features included perivascular space invasion. Immunohistochemical staining using a panel of CD10, bcl-6 and MUM1, six cases were germinal center-like (GCB) and 24 cases were non-germinal central-like (non-GCB). The positive rates of bcl-2, bcl-6 and C-MYC were 53.3% (16/30), 80.0% (24/30) and 20.0% (6/30), respectively. Genetic alterations were detected by FISH and the gene arrangement rates of bcl-2, bcl-6 and C-MYC were 3.3% (1/30), 16.7% (5/30) and 3.3% (1/30), respectively. There were 19 cases in stage 0-1 disease and 11 cases had stage 2-3 disease. Postoperative follow-up for average 13.6 months showed the median survival of 10 months, one-year survival of 46.7% and 16 patients died within a year. Conclusions: The clinical prognosis of primary central nerve system DLBCL depends on age, clinical performence status score, IPI score, immune classification and treatment. Patients typically progress rapidly with the high mortality within one year of diagnosis. Surgical resection combined with high-dose methotrexate or cytarabine chemotherapy offer the best treatment option.

[The Study of relationship between fetal radius loss and chromosomal abnormality]

Objective: To explore the relationship between fetal radius loss and chromosomal abnormalities. Methods: Collect data of 3 100 cases pregnant women who had been checked in the second hospital of Jilin University from 2012 to 2015.There were 8 cases of absent radius, except 1 case of fetal lost follow-up, the remaining 7 cases had complete ultrasound, chromosome examination and the result of induction.The relationship between fetal radius loss and chromosomal abnormalities were analysed. Results: There were 1 case of 21 trisomy syndrome, 1 case of trisomy 13 syndrome, 2 cases of trisomy 18, 2 cases of chromosome translocation, 1 case of normal chromosome result and 1 case was lost to follow-up of the 8 absent radius fetuses. Conclusion: Through a comparison between the chromosome and ultrasonic characteristics of fetuses who have absent radius, we had indicated the relationship of fetal radius deletion and chromosomal anomaly, improved the positive rate of chromosome invasion examination, and provided the reference for eugenics.

[Prenatal ultrasound diagnosis, prognosis and chromosome analysis of fetal bowel dilatation]

Objective: To investigate the relationship among the prenatal ultrasound, prognosis and chromosome results of fetal bowel dilatation. And in order to further improve the positive rate of prenatal chromosome examination operation, and reduce the risk of missed diagnosis. Methods: Ninety fetuses who were diagnosed as fetal bowel dilatation by prenatal ultrasound from June 2013 to December 2015 in the Second hospital of Jilin University were enrolled. Chromosomes were examined by amniotic cavity puncture or umbilical cord blood puncture. The change of fetus's bowel was monitored periodically by prenatal ultrasound. The normal bowel movement of newborns was a good prognosis. The abdominal X ray or barium contrast radiography was performed in the newborns who did not have normal bowel movement after delivery. Patients underwent surgery or conservative treatment after diagnosis. Fetal karyotype analysis of aborted fetus was carried out by amniotic cavity puncture and umbilical cord blood before induction of labor. Autopsy was performed after induced labor. Patients who were not continued examination in our hospital were followed up by telephone. Results: Among the 90 fetuses, there are 11 cases of duodenum dilatation, 38 cases of jejunum and ileum dilatation, 41 cases of colorectal dilatation. Ten cases of duodenum dilatation were confirmed by autopsy after induced labor, and one case was lost in follow-up. Chromosome examination revealed 3 cases of 21- three body syndrome, 1 case of 18- three body syndrome, 1 case of chromosomal translocation. In 38 cases of jejunum and ileum dilatation, bowel dilatation of 26 cases had decrease or no obvious increase with good prognosis. Six cases of induced labor, 3 cases of receive surgery after birth, 2 cases of postoperative survival, and 3 cases of loss of follow-up. Chromosome examination revealed 1 case of 21- three body syndrome and 1 case of chromosomal translocation. In 41 cases of colorectal dilatation, 29 cases had good prognosis. Five cases were aborted, 1 case of fetal death, 2 cases died within 1 month after birth, 2 cases received surgery after birth and survived after operation, and 2 cases of loss of follow-up. Conclusions: Clinical prognosis and the associated risk of chromosome abnormalities in patients with fetal bowel dilatation are different in terms of its expansion location and extent of the different, which need to a specific analysis of specific situations.

[Effect of autophagy inhibitor combined with EGFR inhibitor on triple-negative breast cancer MDA-MB-468 and MDA-MB-231 cells]

OBJECTIVE

To investigate the effect of combined administration of autophagy inhibitor 3-methyladenine/bafilomycin A1 and EGFR inhibitor gefitinib on triple-negative breast cancer MDA-MB-468, MDA-MB-231 cells and estrogen receptor-positive MCF-7 cells.

METHODS

All the cells were treated with 3-methyladenine/bafilomycin A1 and/or gefitinib. The effect of autophagy inhibitor and gefitinib on the cell growth was evaluated by MTT assay. Cell apoptosis was detected by flow cytometry. Western blot analysis was used to determine the alteration of autophagy-related protein (such as LC3) and apoptosis-related proteins (such as caspase-3 and caspase-9).

RESULTS

MTT assay showed that the IC50 in the GE+ 3-MA and GE+ BAF groups were (4.1±0.2) μmol/L and (3.8±0.3) μmol/L, significantly lower than that of the gefitinib alone group [(7.0±0.2) μmol/L] in MDA-MB-468 cells (P<0.05). Similarly, the IC50 in the GE+ 3-MA and GE+ BAF groups were (9.7±0.1) μmol/L and (7.7±0.2) μmol/L, significantly lower than that of the gefitinib alone group [(14.7±0.1) μmol/L]in MDA-MB231 cells (P<0.05). The flow cytometry assay revealed that the apoptosis rates of MDA-MB-468 cells in GE, GE+ 3-MA and GE+ BAF groups were (12.43±3.18)%, (23.37±2.71)% and (18.71±2.81)%, respectively. The apoptosis rates of MDA-MB-231 cells of the GE, GE+ 3-MA and GE+ BAF groups were (12.15±1.82)%, (16.94±2.19)% and (33.83±5.92) %, significantly higher than that of the gefitinib alone group (All P<0.05). The apoptosis rates of the MCF-7 cells were not changed significantly among the three groups (P>0.05). Western blot data showed that the expression levels of LC3 and p-Akt were decreased in the combined groups than that of the gefitinib alone group, while the p-PTEN, caspase-3 and caspase-9 were increased.

CONCLUSIONS

Autophagy inhibitor may enhance the sensitivity to gefitinib in MDA-MB-468 and MDA-MB-231 cells by activation of the PTEN/P13K/Akt pathway. Apoptosis in MDA-MB-468 and MDA-MB-231 cells might be enhanced by the combination treatment through caspase cascade.

[Research of the effect of bone mineral density and fracture site of the vertebrae on low back pain in elderly patients with osteoporotic vertebral compression fractures]

OBJECTIVE

To investigate the effect of bone mineral density(BMD) and fracture site of the vertebrae on low back pain in elderly patients with osteoporotic vertebral compression fractures.

METHODS

From August 2011 to August 2013, a total of 107 senile patients with osteoporotic vertebral compression fractures underwent percutaneous vertebroplasty were followed up for more than 2 ( average 2.5) years in Department of orthopedics, Xuanwu Hospital, Capital Medical University. The incidence of low back pain after vertebroplasty were analyzed on visual analog scale (VAS), and the relationship between BMD, vertebral fracture site were investigated.

RESULTS

A total of 18 cases(16.8%)after vertebroplasty have significant low back pain. Along with BMD decreased [(-2.90±0.91) vs (-4.87±0.52)], the VAS of low back pain increasing, which showed statistical significance difference[(-3.12±0.91) vs (4.03±1.08), P<0.05]. The site of vertebral fracture was lower, the VAS was higher.

CONCLUSIONS

About 16.8% patients show obvious low back pain after vertebroplasty. BMD and Vertebral fracture site were important factors of low back pain in elderly patients with osteoporotic vertebral compression fractures after vertebroplasty.

Association of NPRA and NPRC gene variants and hypertension in Mongolian population

NPRA and NPRC are candidate susceptibility genes for essential hypertension (EH) and play a key role in the regulation of plasma levels and biological effects of natriuretic peptides. The aims of the present study were to find new genetic markers in the NPRA and NPRC genes and to assess relationships between variants and EH. A total of 797 unrelated Mongolian herdsmen were enrolled, including 389 EH patients and 408 normotensive controls. Genotyping was performed using the polymerase chain reaction/ligase detection reaction assay. The distribution of the T-allele frequency of rs1847018 in NPRC differed significantly between hypertensive subjects and controls. There was an association between rs1847018 and EH in the additive model in NPRC (P < 0.05). There were no significant differences in the genotype and allele frequency distributions for any of the 3 single nucleotide polymorphisms in NPRA between EH and normotensive individuals. In NPRA, the frequency of haplotype TCA in the EH group was significantly lower than in controls, while the frequency of haplotype TCG was significantly higher in the EH group than in controls; Individuals who possessed the TCA haplotype had a significantly lower risk of EH, whereas the presence of haplotype TCG was significantly associated with a higher risk of EH. However, there was no significant difference between the EH group and controls in any of the 8 haplotypes in NPRC. Rs1847018 is a genetic marker of EH in NPRC, and the frequency of haplotype TCA and TCG in NPRA is associated with EH in the Mongolian population.

Association of regulator of G protein signaling (RGS5) gene variants and essential hypertension in Mongolian and Han populations

Genetic variants of the RGS5 gene are believed to be risk factors for hypertension and cardiovascular diseases. In this study, we investigated the association between RGS5 gene variants and hypertension in the Mongolian and Han populations. Peripheral blood was obtained from 429 unrelated Mongolian herdsmen and 416 Han farmers [including essential hypertension (EH) patients and controls]. Nine tagSNPs within the RGS5 genes were retrieved from HapMap, and the samples were individually genotyped using the polymerase chain reaction/ligase detection reaction assay. The distribution of the allele frequency of rs12035879 differed significantly between hypertensive subjects and controls in the Han population, while the distribution of the allele and genotype frequencies of rs16849802 differed significantly between hypertensive subjects and controls in the Mongolian population. We observed an association between rs16849802 and EH in the Mongolian population. The frequency of haplotype GAA was significantly higher in the EH group than in controls in the Mongolian population. However, the EH group and controls did not differ significantly in all 6 haplotypes in the Han population. The rs16849802 and haplotype GAA independently increased the risk of EH in Mongolian patients, and may be used as a risk factor for the prediction of high blood pressure.

Effects of flavones of sea buckthorn fruits on growth performance, carcass quality, fat deposition and lipometabolism for broilers

The objective of this study was to evaluate the effects of different levels of flavones of sea buckthorn fruits (FSBF) on growth performance, carcass quality, fat deposition, and lipometabolism for broilers. 240 one-day-old Arbor Acres male broilers were randomly allotted to 4 dietary treatments (0, 0.05%, 0.10%, and 0.15% FSBF) with 6 replicates of 10 birds. Broilers were reared for 42 d. Results showed FSBF quadratically improved average daily feed intake (ADFI), average daily gain (ADG), and final body weight (BW) (P = 0.002, P = 0.019 and P = 0.018, respectively). The abdominal fat percentage in 0.05%, 0.10%, and 0.15% FSBF supplementation groups was decreased by 21.08%, 19.12%, and 19.61% with respect to the control group, respectively (P < 0.05). The intramuscular fat (IMF) content in the breast muscle of the broilers was increased by 7.21%, 23.42% and 6.30% in 0.05%, 0.10% and 0.15% FSBF groups, and that in the thigh meat was raised by 4.43%, 24.63% and 12.32%, compared with the control group, respectively (P < 0.05). FSBF had a quadratic effect on the abdominal fat percentage and IMF in the breast muscle (P < 0.05). Dietary FSBF also modified fatty acids of muscular tissues, resulting in a higher ratio of unsaturated to saturated fatty acids (P < 0.05). Supplementing FSBF in the diet greatly decreased the levels of triglyceride, cholesterol, and low-density lipoprotein cholesterol (P < 0.05). Moreover, the quadratic responses were also observed in the levels of insulin and adiponectin in serum (P = 0.020 and P = 0.037, respectively). Abdominal fat percentage was correlated negatively with insulin and positively with adiponectin (P < 0.05). IMF content in the breast and thigh muscles were correlated positively with insulin, and negatively with adiponectin (P < 0.05). A positive correlation existed between breast muscle, IMF, and leptin (P < 0.05). In conclusion, adding FSBF into the diets affected growth performance and fat deposition of broilers by regulating lipometabolism. Fat deposition and distribution of broilers were closely associated with concentrations of insulin and adiponectin. The optimal level of FSBF supplemented in diet was 0.05 to 0.10% in this study.

Correlation analysis between single nucleotide polymorphism of DRD1 gene and stereotyped behavior of blue fox

This study was performed to investigate the correlation between stereotyped behavior of the blue fox and single nucleotide polymorphisms (SNPs) of the DRD1 gene. We choose the DRD1 gene as a major gene for investigating the correlation of gene polymorphism and self-biting disease by means of direct sequencing. Part of the DRD1 gene exon of the blue fox was cloned; the length of the whole sequence was 864 bp. Four SNPs were detected and analyzed by the chi-square analysis; the results showed that the gene polymorphism of T206C in the DRD1 gene had a significant correlation with self-biting (P < 0.01). Therefore, marker-assistant selection on self-biting of blue foxes using these SNPs can be applied to select healthy individuals.

Frequency, suppressive capacity, recruitment and induction mechanisms of regulatory T cells in sinonasal squamous cell carcinoma and nasal inverted papilloma

Background

Sinonasal squamous cell carcinoma (SSCC) and nasal inverted papilloma (NIP) represent the predominant type of malignant and benign tumors in sinonasal tract, respectively. CD4⁺CD25⁺Foxp3⁺ natural regulatory T (Treg) cells might play critical role(s) in the suppression of anti-tumor immune response and thus shed light on tumor progression from benign to malignant.

Objective

This study aimed to evaluate the frequency and suppressive capacity of Treg cells in SSCC compared to NIP and further to explore the underlying mechanisms.

Patients and Methods

Frequencies of Treg, Th1 and Th2 cells were evaluated by flow cytometry in tissue homogenate and peripheral blood from 31 SSCC patients, 32 NIP patients and 35 normal controls. Treg cells were tested for regulatory function by co-culture with effector T cells. CCR4 and its ligands, CCL22 and CCL17, were analyzed by flow cytometry and Luminex, respectively. The chemoattractant properties of CCR4/CCL22 and CCR4/CCL17 for Treg cells were assessed using the Boyden chamber technique, to elucidate the potential mechanisms of Treg recruitment in tumor microenvironment. Treg cells induction via TGF-β was assessed with transwells after local CD4⁺Foxp3⁺ T cells were assessed by immunohistochemistry and TGF-β concentration was measured by Luminex.

Results

Tumor-infiltrating Treg cells increased significantly from normal to NIP to SSCC (P ≤ 0.001 for normal vs. NIP and P = 0.004 for NIP vs. SSCC). Significantly elevated frequency and enhanced suppression capacity of circulating Treg cells in SSCC were detected compared to NIP and healthy controls, concomitant with Th1 decrease and Th2 increase. Apparently increased CCL22 attracted CCR4-expressing Treg cells to tumor microenvironment in SSCC, compared to NIP. SSCC produced significantly more TGF-β than NIP and thus possessed greater potential for Treg cell induction.

Conclusion

Frequency and suppressive capacity of Treg cells enhanced with progression of malignancy from NIP to SSCC. Circulating Treg cells were recruited to tumor tissue via CCR4/CCL22 signalling, whereas tumor-synthesised TGF-β contributed to induction of peripheral Treg cells.

Prediction of digestible and metabolizable energy content of rice bran fed to growing pigs

Two experiments were conducted to determine the digestible energy (DE) and metabolizable energy (ME) content of 19 rice bran samples and to develop prediction equations for DE and ME based on their chemical composition. The 19 rice bran samples came from different rice varieties, processing methods and regions. The basal diet was formulated using corn and soybean meal (74.43% corn and 22.91% soybean meal and 2.66% vitamins and minerals). The 19 experimental diets based on a mixture of corn, soybean meal and 29.2% of each source of rice bran, respectively. In Exp. 1, 108 growing barrows (32.1±4.2 kg) were allotted to 1 of 18 treatments according to a completely randomized design with 6 pigs per treatment. The treatment 1 was the control group which was fed with basal diet. The treatments 2 to 18 were fed with experimental diets. In Exp. 2, two additional rice bran samples were measured to verify the prediction equations developed in Exp. 1. A control diet and two rice bran diets were fed to 18 growing barrows (34.6±3.5 kg). The control and experimental diets formulations were the same as diets in Exp. 1. The results showed that the DE ranged from 14.48 to 16.85 (mean 15.84) MJ/kg of dry matter while the ME ranged from 12.49 to 15.84 (mean 14.31) MJ/kg of dry matter. The predicted values of DE and ME of the two additional samples in Exp. 2 were very close to the measured values.

Effects of p-chlorophenoxyisobutyric acid, arabinogalactan, and activated charcoal on microspore embryogenesis in kale

To improve embryogenesis in microspore cultures of kale (Brassica oleracea L. var. acephala DC.), 6-benzylaminopurine (6-BA), naphthaleneacetic acid (NAA), arabinogalactan (AG), p-chlorophenoxyisobutyric acid (PCIB), and activated charcoal (AC) were added to the medium using four varieties of kale. The results showed that the addition of AG (0.1-0.2 g/L), AC (0.1-0.2 g/L) or a combination of 6-BA (0.1-0.2 mg/L) and NAA (0.1-0.2 mg/L) promoted embryo-genesis. Adding 40 μM PCIB or a combination of 40 μM PCIB and 0.2 g/L AC to NLN-13 medium at pH 5.8 effectively enhanced embryogenesis. Treatment with a combination of 40 μM PCIB and 10 mg/L AG gave the highest rate of embryonic induction, especially in genotype "Y007," which showed a twelve-fold increase in yield.

Grasshopper (Orthoptera: Acrididae) community composition in the rangeland of the northern slopes of The Qilian Mountains in northwestern China

In order to describe grasshopper (Orthoptera: Acrididae) species composition, diversity, abundance, and density of four rangelands types, we compared the grasshopper community composition and dynamics in the rangeland of the northern slopes of the Qilian Mountains. In total, 55 grasshopper species were collected from 2007 to 2009, representing three families and six subfamilies. The subfamily Oedipodinae was dominant, followed by Gomphocerinae and Catantopinae. Species abundance varied among rangeland types (RTs). The greatest abundance of grasshoppers was found in mountain rangeland, while the lowest abundance of grasshoppers was caught in alpine shrublands. Three species (Chorthippus cf. brunneus (Thunberg) (Acrididae), Chorthippus Dubius (Zubovski), and Gomphocerus licenti (Chang) were broadly distributed in the four RTs and constituted 7.5% of all grasshoppers collected. Ch. dubius was very abundant in desert rangeland and alpine shrubland. Bryodema dolichoptera Yin et Feng Eremippus qilianshanensis Lian and Zheng, and Filchnerella qilianshanensis Xi and Zheng (Pamphagidae) were endemic to the region of the Qilian Mountains. Species similarity between RTs ranged from 17.8 to 51.6 based on the Renkonen index. Similarly, the Sörensen index indicated a wide separation in species composition among RTs. The abundance of the eight most common species showed obvious differences among RTs and years. On average, mountain rangeland had the highest density values in 2007 and 2008, and alpine shrubland supported the smallest density. The densities in desert and mountain rangeland in 2007 were significantly higher than in 2008, while alpine rangeland and shrublands did not present obvious differences among years.

Morphological effects of the nanostructured ceria support on the activity and stability of CuO/CeO2 catalysts for the water-gas shift reaction

Three CuO/CeO2 catalyst with different morphologies of ceria, namely nanospheres, nanorods and nanocubes, were synthesized and used to catalyze the water-gas shift (WGS) reaction. The reactivity tests showed that the Cu supported on the ceria nanospheres exhibited both the highest activity and superior stability when compared with the nanocube and nanorod ceria catalysts. Operando X-ray diffraction (XRD), X-ray absorption fine structure (XAFS) and diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) methods were used to characterize these catalysts in their working state. High resolution electron microscopy (HRTEM, STEM) was used to look at the local atomic structure and nano-scale morphology. Our results show that the morphology of the ceria support, which can involve different crystal faces and concentrations of defects and imperfections, has a critical impact on the catalytic properties and influences: (1) the dispersion of CuO in the as-synthesized catalyst; (2) the particle size of metallic Cu upon reduction during the WGS reaction, (3) the stability of the metallic Cu upon variations of temperature, and (4) the dissociation of water on the ceria support. The nanosphere ceria catalyst showed an excellent water dissociation capability, the best dispersion of Cu and a strong Cu-Ce interaction, therefore delivering the best performance among the three WGS catalysts. The metallic Cu, which is the active species during the WGS reaction, was more stabilized on the nanospheres than on the nanorods and nanocubes and thus led to a better stability of the nanosphere catalyst than the other two architectures. Each catalyst exhibited a distinctive line-shape in the 800-1600 cm(-1) region of the DRIFTS spectra, pointing to the existence of different types of carbonate or carboxylate species as surface intermediates for the WGS.

Simultaneous integrated boost intensity-modulated radiotherapy for treatment of locally advanced non-small-cell lung cancer: a retrospective clinical study

OBJECTIVE

To evaluate the clinical efficacy and safety of simultaneous integrated boost intensity-modulated radiotherapy (SIB-IMRT) for patients with locally advanced non-small-cell lung cancer (LANSCLC).

METHODS

48 patients with LANSCLC treated with SIB-IMRT from January 2010 to April 2012 were retrospectively analysed. A radiation dose of 45-63 Gy (median dose, 51.58 Gy) was delivered to the planning target volume (1.8-2.0 Gy daily fractions) simultaneously with 55.0-74.2 Gy (median dose, 63 Gy) to the planning gross tumour volume (2.00-2.25 Gy daily fractions). 45 patients received concurrent/sequential chemotherapy. The overall survival (OS), locoregional recurrence-free survival (LRFS) and progression-free survival (PFS) were estimated using the Kaplan-Meier method. Treatment-related pneumonitis and oesophagitis were graded according to the Common Terminology Criteria for Adverse Events v. 4.0.

RESULTS

By 1 July 2013, 29 of the 48 patients were dead. The median follow-up time for the survivors was 28 months (19-44 months). The median OS and PFS were 21 and 14 months, respectively. The median LRFS time was not reached. The 2-year LRFS, OS and PFS were 62.5%, 45.1% and 28.0%, respectively. Two patients experienced Grade 3 treatment-related pneumonitis, two patients experienced Grade 5 treatment-related pneumonitis and two patients had ≥Grade 3 oesophagitis.

CONCLUSION

SIB-IMRT appears to be an effective therapeutic option in patients with LANSCLC and warrants further evaluation with increased number of patients in prospective clinical trials.

ADVANCES IN KNOWLEDGE

This study explores the feasibility of delivering tumoricidal doses of radiation to primary lesions in non-small-cell lung cancer.

Effect of CDH1 gene methylation on transforming growth factor (TGF-β)-induced epithelial-mesenchymal transition in alveolar epithelial cell line A549

The aim of this study was to investigate the specific molecular mechanism of the transforming growth factor β (TGF-β)-induced epithelial-mesenchymal transition in a lung cancer cell line, and to provide new ideas for targeting therapy of lung cancer. A549 cells were treated with different concentrations of TGF-β and 5-aza-deoxycytidine (5-aza-dC). The morphological changes after the intervention were observed. The change in the expression of the epithelial marker E-cadherin (E-cad) was detected by Western blot. The proliferation of A549 cells was measured using the MTT assay. Cell movement and invasion capacity was evaluated with the cell scratch test and invasion test. TGF-β induced A549 cells to transform to a mesenchymal cell morphology and downregulated the expression of E-cad, and 5-aza-dC inhibited this phenomenon. Compared with the control group, the number of transmembrane cells was higher and cell migration was markedly increased in the experimental group with continued culture in the presence of 10 ng/mL TGF-β, showing significant differences (P < 0.05). CDH1 gene methylation is involved in TGF-β-induced epithelial-mesenchymal transition in the alveolar epithelial cell line A549.

Correlation between atomic structure evolution and strength in a bulk metallic glass at cryogenic temperature

A model Zr_41.25Ti_13.75Ni₁₀Cu_12.5Be_22.5 (at.%) bulk metallic glass (BMG) is selected to explore the structural evolution on the atomic scale with decreasing temperature down to cryogenic level using high energy X-ray synchrotron radiation. We discover a close correlation between the atomic structure evolution and the strength of the BMG and find out that the activation energy increment of the concordantly atomic shifting at lower temperature is the main factor influencing the strength. Our results might provide a fundamental understanding of the atomic-scale structure evolution and may bridge the gap between the atomic-scale physics and the macro-scale fracture strength for BMGs.

Relationship between serum neopterin levels and coronary heart disease

The relationship between serum neopterin levels and coronary heart disease (CHD) was investigated. Eighty-six CHD patients were divided into an acute myocardial infarction (AMI) group (N = 21), an unstable angina pectoris (UAP) group (N = 35), and a stable angina pectoris (SAP) group (N = 30), based on coronary angiography (CAG), 30 subjects without CHD served as the control group. Serum neopterin levels were determined by enzyme linked immunosorbent assay (ELISA), and relationships between neopterin and the severity of stenosis, stenosis number, and the stability of coronary artery were analyzed. Serum neopterin levels were higher in the AMI and UAP groups than in the SAP and control groups (P < 0.01), but no significant differences were observed between the AMI and UAP groups or between the SAP and control groups (P > 0.05). Mean serum neopterin levels were higher in the single, double, and three vessel lesion groups than in the control group (P < 0.05), whereas there were no significant differences among the lesion groups (P > 0.05). Serum levels of neopterin were significantly higher in the type II than in the type I or type III, plaque groups (P < 0.01), the incidence of type II plaque was significantly higher in the AMI and UAP groups compared to the SAP group (P < 0.01). Neopterin likely plays a role in the occurrence and development of athermanous plaque and can serve as a useful biomarker of vulnerable plaques. Immunoreaction may be involved in the pathophysiological process of CHD.

[Re-optimized technology of protective ileostomy with no need of reversal]

OBJECTIVE

To explore the clinical application of aoptimizedtechniquebased onpreviouslyreported protecting stoma with no need forreversal.

METHODS

Thetechniquealso used "the assembly of drainage device" to performprotecting ileostomy. The original method includes enterotomy at the terminal ileum to placedrainage device, which was optimized as follows: two intestinal pursestring with 0.5 cm distance were placed 5 cm away from the ileocecal valve. Transverse enterotomy was performed in the anti-mesenteric side. The assembly was placed at the root of the appendix between two pursestring, and then the intestine purse suture was tighten. Ligation of the small intestine anastomosis between the anastomosis ring at both ends was carried out, and theanastomosis ring was deployed. From the root of the appendix in the cecum wall, the assembly was embedded about 2 cm and pulled out of abdominal cavitythough the Trocar hole.

RESULTS

Seventeen cases of ultra-low rectal cancer completed protecting stoma, including 11 cases through ileocecal protective stoma. All the anastomosis healed well. Defecation drainage tube was removed 3-5 weeks after anastomosis ring degradation. Drainage nozzle healed after 3 to 5 days, and no complications occurred.

CONCLUSION

The optimized ileocecal protective ileostomy has the following advantages: (1)wound healing time is significantly shorter. (2)secondary intestinal fistula can be prevented. (3)no need to fix ileum and less chance of subsequent volvulus, intestinal obstruction.

Significant association between Nijmegen breakage syndrome 1 657del5 polymorphism and breast cancer risk

Many studies were published to evaluate the association between Nijmegen breakage syndrome 1 (NBS1) 657del5 polymorphism and breast cancer risk, but the results remained inconsistent. To derive a more precise estimation on the possible association, we performed a meta-analysis of previous published studies. Case-control studies on the association between NBS1 657del5 polymorphisms and breast cancer risk were included into this meta-analysis. We used the odds ratio (OR) with 95 % confidence interval (95 % CI) to assess the strength of the association. Ten studies with a total of 25,365 subjects were identified and included into this meta-analysis. Meta-analysis of those ten studies showed that there was a significant association between NBS1 657del5 polymorphisms and breast cancer risk (pooled OR = 2.66, 95 % CI 1.82-3.90, P < 0.001). The cumulative meta-analyses showed a trend of a more significant association between NBS1 657del5 polymorphisms and breast cancer risk as data accumulated by publication year. Thus, our meta-analysis suggests that there was a significant association between NBS1 657del5 polymorphisms and breast cancer risk, and NBS1 657del5 polymorphism results in an increased risk of breast cancer.